大功率晶闸管功能性子电路模型及其应用

为了获得可移植性强的大功率晶闸管子电路模型,采用功能建模法构建了一种基于MATLAB/Simulink的大功率晶闸管功能性子电路模型。该模型依据器件主要的动、静态特性搭建了4个功能电路和模块,并采用条件转移语句建立了简单的控制律,简化了模型结构,同时利用阻容电路改进了触发电路,最后采用带二极管的RLC电路产生模拟的反向恢复电流。将模型应用到矿井电网的大功率TCR系统的仿真分析中,得到了不同触发角时的动、静态过程的波形。仿真结果表明该模型能够准确描述晶闸管主要的动、静态特性,从而弥补了PSPICE模型和MATLAB工具箱中模型的不足。

A Functional Subcircuit Model of High Power Thyristor and Its Applications

In order to obtain a portable subcircuit model of thyristor,a novel subcircuit model based on MATLAB/Simulink is proposed by using of functional modeling method in this paper.The model consists of four functional parts according to the main static and dynamic characteristics of thyristor.A control law is built by some conditional branch statements to simplify the structure of the model.In addition,the trigger circuit is improved by the RC circuit,and the simulated reverse recovery current is produced by the proposed RLC circuit with a diode.The waveform which describes the static and dynamic process under different trigger angle of the device is obtained from the simulation of high power TCR system.Simulation results show that the proposed model can describe the static and dynamic process of the device correctly,which remedies the deficiency of PSPICE model and the models in the toolbox of MATLAB.